//
//  PDKeyChain.m
//  PDKeyChain
//
//  Created by Panda on 16/8/23.
//  Copyright © 2016年 v2panda. All rights reserved.
//

#import "VCPDKeyChain.h"

//用户信息
static NSString * const kPDDictionaryKey = @"com.xxx.dictionaryKey_VC";
static NSString * const kPDKeyChainKey = @"com.xxx.keychainKey_VC";
//保存密码
static NSString * const kPDInfoDictionaryKey = @"com.voosntch.dictionaryKey_VC";
static NSString * const kPDInfoKeyChainKey = @"com.voosntch.keychainKey_VC";
//保存UUID
static NSString * const kPDInfoUUIDKey = @"com.voosntch.UUIDKey_VC";
static NSString * const kPDInfoUUIDKeyChainKey = @"com.voosntch.UUIDkeychainKey_VC";

@implementation VCPDKeyChain
//UUID
+ (void)keyUUID:(NSString *)uuid {
    NSMutableDictionary *tempDic = [NSMutableDictionary dictionary];
    
    [tempDic setObject:uuid forKey:kPDInfoUUIDKey];
    [self save:kPDInfoUUIDKeyChainKey data:tempDic];
}
//UUID
+ (NSString *)keyUUIDLoad{
    NSMutableDictionary *tempDic = (NSMutableDictionary *)[self load:kPDInfoUUIDKeyChainKey];
    return [tempDic objectForKey:kPDInfoUUIDKey];
}

+ (void)keyInfo:(NSString *)info {
    NSMutableDictionary *tempDic = [NSMutableDictionary dictionary];
    
    [tempDic setObject:info forKey:kPDInfoDictionaryKey];
    [self save:kPDInfoKeyChainKey data:tempDic];
}

+ (NSString *)keyInfoLoad{
    NSMutableDictionary *tempDic = (NSMutableDictionary *)[self load:kPDInfoKeyChainKey];
    return [tempDic objectForKey:kPDInfoDictionaryKey];
}


+ (void)keyChainDelete{
    [self delete:kPDKeyChainKey];
    [self delete:kPDInfoKeyChainKey];
}

+ (NSMutableDictionary *)getKeychainQuery:(NSString *)service {
    return [NSMutableDictionary dictionaryWithObjectsAndKeys:
            (id)kSecClassGenericPassword,(id)kSecClass,
            service, (id)kSecAttrService,
            service, (id)kSecAttrAccount,
            (id)kSecAttrAccessibleAfterFirstUnlock,(id)kSecAttrAccessible,
            nil];
}

+ (void)save:(NSString *)service data:(id)data {
    //Get search dictionary
    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
    //Delete old item before add new item
    SecItemDelete((CFDictionaryRef)keychainQuery);
    //Add new object to search dictionary(Attention:the data format)
    [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(id)kSecValueData];
    //Add item to keychain with the search dictionary
    SecItemAdd((CFDictionaryRef)keychainQuery, NULL);
}

+ (id)load:(NSString *)service {
    id ret = nil;
    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
    //Configure the search setting
    //Since in our simple case we are expecting only a single attribute to be returned (the password) we can set the attribute kSecReturnData to kCFBooleanTrue
    [keychainQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData];
    [keychainQuery setObject:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];
    CFDataRef keyData = NULL;
    if (SecItemCopyMatching((CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
        @try {
            ret = [NSKeyedUnarchiver unarchiveObjectWithData:(__bridge NSData *)keyData];
        } @catch (NSException *e) {
            NSLog(@"Unarchive of %@ failed: %@", service, e);
        } @finally {
        }
    }
    if (keyData)
        CFRelease(keyData);
    return ret;
}

+ (void)delete:(NSString *)service {
    NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
    SecItemDelete((CFDictionaryRef)keychainQuery);
}

@end
